4. Sizing the H2 Storage Tanks
The fourth output of the proposed program is the capacity of the hydrogen storage tank.
The hydrogen storage tank is a daily storage; hence it should withhold the amount of
hydrogen required by the fuel cell in the absence of radiation. Fig. 5 emphasizes the period
of working electrolyzer through route B during sun hours and full in H2 storage tank. On the
other hand, it shows that the fuel cells are working during route C and D. From this
figure it can be seen that the maximum storage value equal to 12840 Nm3-H2 which is equal
to the sizing of the storage tank. According to Van der Waals equation, size of storage tanks
is 80 m3 are installed and are rated for use up to 200 bar, which gives a maximum storage of
12840 Nm3 hydrogen gas. A 13.22 kW compressor is used to raise the pressure from the
electrolyzer to that of the store.